House finch

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description and distribution

...called scarlet grosbeak, and the purple finch (
C. purpureus), breeding in northern North America, are alike in having the head wholly red and the underparts virtually unstreaked. The
house finch (
C. mexicanus), with red forehead band and streaked underparts, is a dooryard bird throughout western North America; it is often called linnet. This species was introduced (1940)...

good genes hypothesis

...accumulating, primarily through the discovery of male traits that are simultaneously preferred by females and correlated with increased offspring survival. For example, female North American
house finches (
Carpodacus mexicanus) prefer to mate with bright, colourful males. Such male finches also have high overwinter survivorship. This preference suggests that mating with such males will...

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